Jack Schofield: Jim Allchin, the departing boss of Windows development at Microsoft, accidentally caused a stir when he was reported as saying that Vista did not need antivirus software. He said no such thing.

Jack Schofield: A group of hackers has reportedly had some success in making Apple's Intel version of Mac OS X run on standard PCs, not just the one Apple is renting out as part of its software developers kit.